Senior Software Engineer

**Senior Backend Engineer** **Berlin | Hybrid** We’re working with an established technology business that is continuing to invest heavily in its engineering capabilities. They’re looking for a Senior Backend Engineer with strong Python experience to join a collaborative product team and take ownership of important backend services and cloud infrastructure. This is a hands-on role for someone who enjoys building robust systems, improving performance and working closely with engineers across the wider product organisation. **The Role** You’ll play a key role in designing, developing and evolving backend services within a predominantly cloud-based environment. Your responsibilities will include: * Designing and developing scalable backend services using Python and AWS * Building efficient serverless applications and APIs * Working with technologies such as AWS Lambda, S3 and other AWS services * Developing and maintaining APIs using frameworks such as FastAPI, Django or Flask * Designing and optimising data solutions using PostgreSQL, DynamoDB and caching technologies * Improving application performance, reliability and scalability * Establishing and improving automated testing, including unit, integration and end-to-end testing * Contributing to CI/CD processes and engineering standards * Working with modern dependency and package management approaches * Helping maintain clean, well-documented and maintainable codebases * Contributing to the architecture and integration of backend services with other parts of the wider technology ecosystem * Working closely with frontend engineers, QA, product, UX/UI and AI specialists * Taking an active role in an agile development environment and contributing ideas that improve how the team works **What We’re Looking For** We’re looking for an experienced backend engineer who enjoys solving technical problems and wants genuine ownership over the systems they build. You’ll ideally bring: * 5+ years of professional backend development experience * Strong commercial experience with Python * Experience with TypeScript and/or JavaScript * Hands-on experience building APIs and backend services * Experience with frameworks such as FastAPI, Django, Flask or similar * Strong knowledge of relational databases, particularly PostgreSQL * Experience with NoSQL technologies such as DynamoDB would be beneficial * Good understanding of AWS and cloud-based architecture, particularly serverless technologies * Experience with automated testing and modern software development practices * Familiarity with CI/CD tooling such as GitHub Actions * Experience with modern Python dependency management tools such as Poetry, uv or pip * **A good understanding of software architecture, design patterns, scalability and performance is a must** * Experience working within an agile engineering team **What’s On Offer?** You’ll be joining an established technology business with a collaborative engineering culture and plenty of opportunity to influence how things are built. The package includes: * Basic salary of up to €90k depending on experience * Hybrid working with a modern Berlin office * A high degree of autonomy and ownership * Subsidised health, transport and lifestyle benefits * Employee discounts and additional company perks